Euastacus hystricosus, the Conondale spiny crayfish is a species of southern crawfish in the family Parastacidae.

It lives in permanent riffles, runs, glides and pools, and takes shelter under rocks, logs, and burrows.

The assessment concluded that due to its very restricted range, Euastacus hystricosus was vulnerable to localized threats such as bush fires, habitat destruction, collection, and predation by introduced species such as the cane toad and feral cats.

In addition, warming temperatures and drought increase the risk of high intensity fires that can kill Euastacus hystricosus and alter its habitat.

Other conservation efforts proposed by the DCCEEW are monitoring of population and habitat quality, controlling illegal collection for the aquarium trade, reviewing fire management policies, providing education to private landowners, and develop monitoring programs for feral pigs and weeds.